Improvement in sectional steam-generators



2sheers--sheeu- W. W. GRANE.v

Sectional Steam Genaratnrs.' A N0. 138,791. Patented. Mayl3,1873.

Witneszsns: l Inventor.

AM. #Hmmm/camarilla CQ. rm; osaofawfls Pnqcass) 2She-ets--Sheet2- W. W.GRANL Sectional Steam Generators.

No. 138,791, PatentedMaywns.

Witnesses s .Ht/orn'eys. y

AM PHoTM/THMRAP/l/c co. #.fosnolwes PROCESS? v UNITED STATES PATENTOFFICE.

wELLsLY w. cRANE, Vor AURRN,l NE'w YORK.

IMPROVEMENT IN SECTIONAL S1r'EAM-GENERATORS.`

Specification forming part of Letters Patent No. 138,791, dated May 13,1873 application filed' April 12, 1873.

To all whom it may concern Be it known that I, WELLsLY W. CRANE, ofAuburn, in the county of Cayuga and in the State of New York, haveinvented certain new and useful Improvements in SectionalSteam-Generators5 and do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawing and to the letters of reference marked thereon,making a part of this specification.

The nature of my invention consists in the construction and arrangementof asectional steam-boiler, as will be hereinafter more fully set forth.v

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation,referring to the annexed drawing, in which-Figure lis a side elevation of one section of my boiler. Fig. 2 is alongitudinal sec-- tion of one of the tubes composing the boiler; andFig. 3 is a horizontal section through the front parts of two of thesections of the boiler. Fig. 4 represents a perspective View of the sideof the generator opposite to the side shown in Fig. l, showing thehollow an ge on the front piece.

Each section of my steam-boiler is composed of a hollow front piece, A,water-pipes B B, and smoke-pipes U C. The front piece A has parallel`walls, and may be made of any suitable dimensions, with an enlargement,D, at the upper end, forming a steamdome, each section thus having itsown separate steam-dome. Along the front edge, on one side of the frontpiece A, is formed a hollow rib or flange, a, extending the entirelength of the front piece, and around the front and upper side of thesteam-dome, which rib or flange is, by means of openings b b, connectedwith the interior of the front piece and dome, so that the water andsteam will stand in the same in like manner, or at the same height as inthe front piece. When the sections are put together, this hollow rib orange a forms a space, d, between the front pieces, as shown in Fig. 3,thus increasing the heating-surface.

The water-pipes B B, of which there may be any desired number, accordingto the size of the boiler desired, are screwed' into the rear wall ofthe front piece A, and one smoke-pipe, C, passes through the center ofeach water-pipe B, the front end of such smoke-pipe being screwed into ahollow screw, f, which is screwed into the front-wall of the front pieceA. The rear end of each smoke-pipe C is screwed into a socket, G, orratherinto the bottom or end piece of the socket, and this socket isscrewed onto the end of the water-pipe B. The socket Gr is formed with asmaller socket, h, on its under side, there being a communication, t',between the two sockets, as shown in Fig. 2.

Into the socket h is screwed a pipe, I, which communicates with amud-drum, J, underneath,`and this drum is, by a pipe, K, connected witha drum or pipe, L, located in front of the lower ends of the frontpieces A A, and connected with them at their lower ends by pipes m m.

By this means a perfect circulation of the water is established, eachwater-tube B having its own and separate connection with the mud-drumbelow.

The top of each steam-dome D has a short pipe, n, to connect it with thesteam-pipe from which the steam is then conveyed to the place wherewanted.

The smoke passing through the pipes C C from the back to the front,heats the front side of the front pieces A A, and thus the wholesurface'of these front pieces becomes heatingsurface, except justl thatportion which is in contact with the hollow rib or flange a, the frontand back of said rib being, also, heating-surface.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is y l. The front piece A, providedwith an enlargement, D, at its top, and a hollow flange, a, on one side,which extends from top to bottom, substantially as and for the purposesherein set forth.

2. The combination of the screw-socket G and extension h, with rthewater.- tube B, smoke-pipe G, and circulating-pipe I, screwed each end,the smoke-pipe or pipes C with screw-threads on each end, theserewfsooket or sockets Gr having extensions h, circulatingpipe or pipesI, and the mud-drum J, all oo nstrueted substantially as and for thepurposes l herein set forth.

In testimony that I claim the foregoing I Y have hereunto set my handthis 9th day of April, 1873.

' WELLSLY W. CRANE.

Witnesses A. N. MARR, C. L. EVERT.

